Adams Arms Piston Review

Steve Johnson
by Steve Johnson

Murdoc has written a review of the Adam Arms retrofit piston system for the AR-15 for Guns and Hunting.

The new Adams Arms gas block quickly mounted with hex screws and a new bolt carrier key, a couple springs and a bushing were all that was needed before adding the sleeved drive rod. Supplied front handguards mounted normally, and I was left going back over the installation manual, convinced that I must have missed something. It was that easy. Though it took me more than half an hour due to the troublesome factory gas block, this is certainly a task that can be accomplished by a moderately capable gun owner.

It is a well written review and worth reading.

This 3D animation shows how the piston system works verses the AR-15’s normal method of operation, direct gas impingement.

Steve Johnson
Steve Johnson

I founded TFB in 2007 and over 10 years worked tirelessly, with the help of my team, to build it up into the largest gun blog online. I retired as Editor in Chief in 2017. During my decade at TFB I was fortunate to work with the most amazing talented writers and genuinely good people!

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  • L J Gates L J Gates on Jun 15, 2012

    You need to know that Adams early pistion systems come with an engineering defect.
    The gas plug has a e-clip that will fail and render your system in-operable.
    Their customer service dept. says they will replace it with a re-engineered gas plug.
    So far I have found their Cust. ser. to be slow in responding
    Buy with caution

  • Randy Randy on Aug 17, 2012

    I recently had my gunsmith built me a new AR15. The gunsmith alone was great but the real surprise came from the precision craftsmanship of the upper we went with on the build. I am one that likes to keep my money in the area I live. So we decided to go with a Adams Arms Piston upper. After many range trips and a ton of ammo later. I can honestly say it was the best decision I have ever made. This is not my first AR15 but in my opinion it is the best AR I have ever owned. The Adams Arms upper and piston system has worked flawlessly under very heavy use. Cleaning the gun now is a quick and easy task due to the design of the their system and the coatings they use. I could not be happier with Adams Arms and the customer service I have received from them. I highly recommend this company if you are looking for a no hassle, quality built AR upper.